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docs/vmagent.md: mention that vmagent displays up to -promscrape.maxDroppedTargets at /service-discovery page

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Suggest increasing `-promscrape.maxDroppedTargets` command-line flag value if /service-discovery page
misses some dropped targets.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5389
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4018
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Aliaksandr Valialkin 2023-12-07 00:32:54 +02:00
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docs/vmagent.md
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@ -813,7 +813,9 @@ start a cluster of three `vmagent` instances, where each target is scraped by tw
Every `vmagent` in the cluster exposes all the discovered targets at `http://vmagent:8429/service-discovery` page.
Each discovered target on this page contains its status (`UP`, `DOWN` or `DROPPED` with the reason why the target has been dropped).
If the target is dropped because of sharding to other `vmagent` instances in the cluster, then the status column contains
`-promscrape.cluster.memberNum` values for `vmagent` instances where the given target is scraped.
`-promscrape.cluster.memberNum` values for `vmagent` instances where the given target is scraped. Note that `vmagent` shows
up to `-promscrape.maxDroppedTargets` dropped targets on the `/service-discovery` page. Increase the `-promscrape.maxDroppedTargets` command-line flag value
if the `/service-discovery` page misses some dropped targets.
If each target is scraped by multiple `vmagent` instances, then data deduplication must be enabled at remote storage pointed by `-remoteWrite.url`.
The `-dedup.minScrapeInterval` must be set to the `scrape_interval` configured at `-promscrape.config`.